Indiana University-Purdue University Indianapolis (IUPUI) / This study seeks to elucidate the concept of resources at risk as detailed in the Coordinated Management of Meaning (CMM) theoretical framework. Risk is the possibility that a communicator’s resources are in jeopardy of change, and this study seeks to explicate how a communicator places his or her resources at risk. An undergraduate spring break study abroad program was selected as the context for this examination, with six students participating in before and after interviews. Results showed that three types of resources at risk were identified, with a fourth type unable to be identified through transcript analysis. This study demonstrates theoretical and practical implications that further the understanding of CMM and its execution. In addition, limitations and areas for future research are discussed.

No description available.

<p>Koordinatne merne mašine (KMM) su dominantni merni instrumenti u<br />dimenzionalnoj metrologiji. NJihovom upotrebom se može izmeriti<br />bilo koja makro tolerancija označena na tehničkoj dokumentaciji.<br />Tolerancija ravnosti je često prisutna u cilju izvršenja zahtevanih<br />funkcionalnih zahteva radnog predmeta. Istraživanja sprovedena u<br />ovom radu se bave problemom procene greške ravnosti merene na KMM<br />zasnovane na metodi minimalne zone i procene merne nesigurnosti za<br />ovaj merni zadakat. Aksenat je stavljen na primeni Monte Karlo<br />metode kao simulacionog alata za procenu merne nesigurnosti.<br />Razvijena je nova metodologija za procenu greške ravnosti kao i<br />simulacioni model za procenu merne nesigurnosti za ovaj merni<br />zadatak.</p> / <p>Coordinate measuring machines (CMMs) are dominant measuring<br />instruments in dimensional metrology. These machines can measure any<br />macro-tolerance indicated in the technical documentation. Flatness tolerance<br />is often present with the aim of completing the needed functional<br />requirements of a workpiece. The investigation conducted in this paper<br />considers the problem of assessing the flatness error measured on a CMM<br />based on the minimum zone method and on the method of evaluating<br />measurement uncertainty for this measuring task. The emphasis is on the<br />use of Monte Carlo method as a simulation tool for evaluating measurement<br />uncertainty. A new methodology for assessing the flatness error has been<br />developed, as well as a simulation model for evaluating measurement<br />uncertainty for this measuring task.</p>

ST Aerospace located at Arlanda airport maintain and repair aircraft components. The maintenance activities that the workshop conducts require testing of the component’s function. For a long time the repair shop has experienced problems with the efficiency in this hydraulic testing. The efficiency problems are partially derived by the fact that the manufacturer’s component maintenance manuals (CMM) are not adapted to the specific test equipment that the shop uses. A lack of suitable training material also causes problems for new operators. The purpose of this thesis work was therefore to streamline this part of ST Aerospace’s operation, first by rewriting the test section of the manuals but also to produce a basic description of the test bench that is used in the testing activities. By studying the operator’s work with component testing a fundamental understanding of the test bench was obtained along with the specific knowledge that was required in order to rewrite the manuals to a version that ST can use with their specific test equipment. Along with the training material a total of four rewritten component manuals were produced on ST’s behalf. Since the purpose of this work was to streamline the company’s entire testing business, there are post-doubts about whether the correct way to address the issue was chosen. As the work continued it became increasingly more obvious that a more appropriate way of handling the efficiency problems should have been to fully focus on the training material for the test bench. By performing the work this way around the future rewriting of the hundreds of component manuals can be drastically simplified and more efficient, therefore the time required for rewriting can be drastically reduced. / ST Aerospace på Arlanda underhåller och reparerar flygplanskomponenter. I de underhållsåtgärder som verkstaden bedriver krävs testning av komponenternas funktion. Under en lång tid har verkstaden upplevt problem med effektiviteten i denna hydrauliska provning. Problemen med effektiviteten härstammar till viss del av att komponenttillverkarens testningsmanualer inte är anpassade till den specifika testutrustning som verkstaden använder sig av. Problemen härstammar också till viss del av att verkstaden haft problem med att utbilda nya operatörer av testutrustningen då lättförståeligt utbildningsmaterial till den avancerade utrustningen saknats. Syftet med detta examensarbete var därför att effektivisera denna del av ST Aerospace:s verksamhet genom att dels skriva om manualers testavsnitt men även att tillverka en lättförståelig beskrivning av verkstadens testutrustning i utbildningssyfte. Genom att följa operatörerna i deras arbete med av företaget utvalda komponenttester kunde en grundläggande förståelse både för testbänken men även för de utvalda testerna erhållas. Erfarenheten från testningen användes till att producera en lättförståelig beskrivning av provbänken samt till omskrivning av de utvalda komponentmanualerna. Utöver utbildningsmaterialet producerades totalt fyra omskrivna komponentmanualer för ST:s räkning. Då syftet med arbetet var att effektivisera hela ST:s provningsverksamhet är det i efterhand tveksamt till om angripningssättet av effektiviseringsproblemen varit rätt. Alltefter arbetets gång insågs i ökande grad att ett mer lämpligt angripningssätt hade varit att lägga all arbetstid på utbildningsmaterialet till provbänken för att på så sätt förenkla de framtida omskrivningarna av komponentmanualer. Ett mer utförligt utbildningsmaterial till testutrustningen kan effektivisera produceringen av omskrivna komponentmanualer betydligt då företaget i dagsläget testar hundratals komponenter.

Made available in DSpace on 2014-12-17T14:06:49Z (GMT). No. of bitstreams: 1 LeilianeAO.pdf: 1040153 bytes, checksum: 7b51c6820dc4a457d8c742b3fc25c179 (MD5) Previous issue date: 2008-08-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The present work shows a contribution to the studies of development and solid sinterization of a metallic matrix composite MMC that has as starter materials 316L stainless steel atomized with water, and two different Tantalum Carbide TaC powders, with averages crystallite sizes of 13.78 nm and 40.66 nm. Aiming the metallic matrix s density and hardness increase was added different nanometric sizes of TaC by dispersion. The 316L stainless steel is an alloy largely used because it s high resistance to corrosion property. Although, its application is limited by the low wear resistance, consequence of its low hardness. Besides this, it shows low sinterability and it cannot be hardened by thermal treatments traditional methods because of the austenitic structure, face centered cubic, stabilized mainly in nickel presence. Steel samples added with TaC 3% wt (each sample with different type of carbide), following a mechanical milling route using conventional mill for 24 hours. Each one of the resulted samples, as well as the pure steel sample, were compacted at 700 MPa, room temperature, without any addictive, uniaxial tension, using a 5 mm diameter cylindrical mold, and quantity calculated to obtain compacted final average height of 5 mm. Subsequently, were sintered in vacuum atmosphere, temperature of 1290?C, heating rate of 20?C/min, using different soaking times of 30 and 60 min and cooled at room temperature. The sintered samples were submitted to density and micro-hardness analysis. The TaC reforced samples showed higher density values and an expressive hardness increase. The complementary analysis in optical microscope, scanning electronic microscope and X ray diffractometer, showed that the TaC, processed form, contributed with the hardness increase, by densification, itself hardness and grains growth control at the metallic matrix, segregating itself to the grain boarders / O presente trabalho apresenta uma contribui??o ao estudo do desenvolvimento e sinteriza??o s?lida de um Comp?sito de Matriz Met?lica CMM que tem como materiais de partida um a?o inoxid?vel 316L atomizado a ?gua, e duas partidas diferentes de Carbeto de T?ntalo TaC, com tamanhos m?dios de cristalitos de 13,78 nm e 40,66 nm. Objetivando aumentar a densidade e dureza da matriz met?lica foi adicionado, por dispers?o diferentes part?culas nanom?tricas de TaC. O a?o inoxid?vel 316L ? uma liga largamente utilizada pela sua propriedade de alta resist?ncia ? corros?o. Contudo, sua aplica??o ? limitada pela baixa resist?ncia ao desgaste, conseq??ncia da sua baixa dureza. Al?m disso, apresenta baixa sinterabilidade e n?o pode ser endurecido pelos m?todos tradicionais de tratamentos t?rmicos, devido a sua estrutura austen?tica, c?bica de face centrada, estabilizada principalmente pela presen?a do N?quel. Amostras de a?os adicionadas com 3% em peso de TaC (cada amostra com carbetos de partidas diferentes), seguiram uma rota de moagem mec?nica em moinho convencional por 24 horas. Cada uma das amostras resultantes, assim como amostras do a?o puro foram compactados a 700 MPa, a frio, sem nenhum aditivo, uniaxialmente, em uma matriz cil?ndrica de 5 mm de di?metro, em quantidade calculada para ter uma altura m?dia final do compactado de 5 mm. Posteriormente, foram sinterizadas em forno a v?cuo, em temperatura de at? 1290? C com incremento de 20 ?C por minuto, sendo mantidas neste patamar por 30 ou 60 minutos e resfriadas ? temperatura ambiente. As amostras sinterizadas foram submetidas aos ensaios para a medi??o da densidade e da micro-dureza. As amostras contendo o refor?o de TaC apresentaram maiores valores de densidade e um aumento significativo na sua dureza. As an?lises complementares no microsc?pio ?tico, no microsc?pio eletr?nico de varredura e no difrat?metro de raios-X, mostram que o TaC, na forma processada, contribuiu com o aumento da dureza, pela densifica??o, pela sua pr?pria dureza e pelo controle do crescimento dos gr?os da matriz met?lica, segregando-se nos seus contornos

Made available in DSpace on 2016-06-02T19:05:47Z (GMT). No. of bitstreams: 1 3388.pdf: 1949798 bytes, checksum: 1a2073d52b18588ac8cb15ca66beb5d9 (MD5) Previous issue date: 2008-05-22 / Universidade Federal de Sao Carlos / Background: The Personal Software ProcessTM (PSP) is a methodology that can be used by software developers to improve the predictability, the productivity and the quality of their personal work. However, the great number of activities and metrics involved in the PSP makes its application very laborious and difficult. Several PSP supporting tools have been proposed in order to make its application more feasible, and such tools evolved as more experiments were conducted with the PSP. There are now three generations of PSP supporting tools, whereas third generation supporting tools are characterized by being able to collect and analyze Software Engineering metrics automatically and unobtrusively. Objective: This study s objective is to determine the difficulties and benefits of using third generation tools to support the PSP application. Method: The GQM paradigm was used to set up two Case Studies, one being in the academic environment with undergraduate students and another in a small software development company. Both case studies featured the PSP application supported by third generation tools. Results: Results show that third generation supporting tools have some advantages over previous generations tools, especially in the coding phase. However, third generation tools have limited PSP activities support and introduce new adoption problems. Conclusion: For a successful long-term PSP application, it is necessary that the supporting tools are completely adapted and integrated in the developers work environment, with both second and third generations tools characteristics. / Cenário: O Personal Software ProcessTM (PSP) é uma metodologia que pode ser usada por desenvolvedores de software para melhorar a previsibilidade, a produtividade e a qualidade de seu trabalho pessoal. No entanto, a grande quantidade de atividades e métricas envolvidas no PSP torna a sua aplicação bastante trabalhosa e difícil. Várias ferramentas de apoio foram propostas com o intuito de facilitar a aplicação da metodologia, sendo que tais ferramentas evoluíram à medida que estudos sobre a aplicação do PSP eram realizados. Assim, existem hoje três gerações de ferramentas de apoio ao PSP, sendo que as ferramentas de 3ª geração caracterizam-se por coletar e analisar métricas de Engenharia de Software automaticamente, sem a necessidade de intervenção direta do desenvolvedor. Objetivo: O objetivo deste trabalho é determinar as dificuldades e os benefícios do uso de ferramentas de 3ª geração para o apoio à aplicação do PSP. Método: Utilizando o paradigma GQM, foram elaborados dois estudos de caso, sendo um em ambiente acadêmico e outro em uma pequena empresa de desenvolvimento de software. Ambos os estudos de caso envolveram a aplicação do PSP com o apoio de ferramentas de 3ª geração. Resultados: Os resultados mostram que ferramentas de 3ª geração apresentam algumas vantagens em relação às ferramentas de gerações anteriores, especialmente na fase de codificação. No entanto, tais ferramentas apóiam um número limitado de atividades do PSP, além de introduzirem novos problemas de adoção. Conclusão: Para que a aplicação do PSP tenha sucesso em longo prazo é necessário que a ferramenta de apoio seja completamente adaptada e integrada ao ambiente de trabalho do desenvolvedor, apresentando tanto características de ferramentas de 2ª quanto de 3ª gerações.

Les packagings d’électronique embarquée sont actuellement en alliages d’aluminium. A partir d’une étude de sélection des matériaux, complétée par une simulation numérique thermique,nous avons démontré qu’un matériau composite constitué d’une matrice aluminium et de fibres de carbone à forte conductivité thermique, représente un fort potentiel de gain de masse sur ces équipements. Cependant, le couplage de ces deux matériaux génère des problèmes d’élaboration en raison d’incompatibilités fortes parmi lesquelles un mouillage très faible du carbone par l’aluminium liquide et une réactivité chimique élevée qui conduit à la formation de carbures d’aluminium préjudiciables pour le matériau final. Deux voies d’élaboration distinctes ont été envisagées : Une voie liquide où l’utilisation d’un agent de mouillage (un sel fluoré) a permis d’obtenir la montée par capillarité du métal dans des mèches de fibres. Une voie solide basée sur une technique originale d’empilements de feuillets d’aluminium et de fibres de carbone avec le procédé de Spark Plasma Sintering (SPS). .La seconde technique s’est révélée prometteuse en permettant d’obtenir des échantillons multicouches sans porosités, un endommagement très limité des fibres et une architecture contrôlée.Notre étude a montré que la formation de carbures d’aluminium est limitée. De plus, une meilleure compréhension du SPS ou l’application d’un revêtement sur les fibres devraient permettre d’éviter la formation de ces carbures. Les tentatives de caractérisations mécanique et thermique effectuées sur ces échantillons donnent un premier aperçu de l’efficacité du renforcement de l’aluminium par les fibres de carbone. / Embedded electronic packagings are currently made of aluminum. A first study – basedupon a material selection method completed by numerical analysis – showed that a metal matrixcomposite made of aluminum and highly thermal conductive continuous carbon fibers represents ahigh potential upon weight savings for those equipments. Though, coupling these componentsrepresents numerous challenges due to their incompatibility such as a really low wetting of carbonliquidaluminum system and its unavoidable chemical reactivity that leads to the formation ofaluminum carbides that are harmful for the final material. Two manufacturing routes were considered: A liquid route using a wetting agent (fluorinated salts) led the metal to rise alongcarbon fibers by capillarity. A solid route based upon a novel technique of aluminum foils and carbon fibersstacking using the Spark Plasma Sintering (SPS) process.This second technique revealed to be very promising and allowed to obtain multilayer samples with noporosities, highly limited fiber damages and controlled composite architecture. Our study shows thataluminum carbides formation is limited. Moreover, a deeper comprehension of SPS process or thedeposit of fiber coatings would prevent this carbide formation. Attempts of mechanical and thermalcharacterization led upon such samples give a first overview of the efficiency of the aluminumreinforcement by carbon fibers.

The thesis deals with the possibilities of the quality information system assessment. The theoretical part of the thesis describes the information systems, explains the term quality in information systems and describes the methods of the IT processes maturity assessment. The implementation of selected methods of the IT process maturity assessment is the content of the practical part of the thesis. A questionnaire survey based on the selected methods was conducted in the SAINT-GOBAIN ADFORS CZ s.r.o. company. The survey was analyzed, the level of the Problem Management process maturity was defined and possible improvements of this process were suggested.

The thesis deals with the design of a suitable length standard for nanometrology. This length standard will be used for metrological traceability of the Rigaku nano3DX located at CEITEC Brno and the SIOS NMM-1 device which is located at ČMI Brno. The first part is focused on the description of these measuring instruments, the analysis of their metrological traceability requirements and the requirements for the material length standard. The second part is devoted to the concrete possibilities of the etalon design, 3D printing of the prototype of the standard and verification of its dimensional compatibility. At the end of the thesis, the evaluation and selection of the appropriate standard design is made.

This diploma thesis deals with the proposal of internal methodology for measurement of products and parts on CMM UPMC Zeiss at CMI Brno. The first part of this work analyzes the current state of knowledge in the field of accurate measurement on coordinate measuring machines (CMM), which includes the definition of basic metrological concepts, methodology for determining and expressing uncertainties of measurement and a general description of CMM. The diploma thesis also contains a detailed description of the UPMC 850 CARAT S-ACC device from the company Zeiss and summarizes the requirements for the testing laboratory in accordance with the standard ČSN EN 17 025: 2018. The next part of the work is focused on defining and determining the measurement uncertainties for this CMM and on developing a testing procedure for measurements on this machine. The final part of this thesis summarizes the achieved results and recommendations for practice.